*{
  margin: 0;
  padding: 0;
}

body{
  width: 100vw;
  height:100vh;
  background: radial-gradient(#caf, rgb(29, 104, 165));
}

.slider-container{
  width: 480px;
  height: 270px;
  margin: 150px auto; 
  position: relative;
  
}

.slider-container img{
  max-width: 100%;
}

.slider-container .btn{
  position: absolute;
  width: 60px;
  height: 60px;
  background: white;
  border-radius: 50%;
  text-align: center;
  line-height: 60px;
  font-size: 24px;
  top: 105px;
  user-select: none;
  cursor: pointer;
}

.slider-container .next{
  right: 0;
}